Question about Princeton Digital VL1916 19" LCD Monitor

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Monitor takes forever to come up the blue light flashes and flashes for a long time I read where the vl1918 needed a capacitor replacment what do you think

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Blackbeard1, Could be it needs Filter caps. I would also closely investigate all solder connections of surface and through hole mounted electronic components for possible "frosty looking" "cold" solder joints that may be thermally intermittant!! 12fix louie

Posted on Feb 04, 2010

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New computer - monitor is ticking on and off. Monitor is the secondary monitor. Sounds like a ticking time bomb - is very annoying. Once I get it going (usually a hard boot), it will stay on. Any advice


This VL1918 series can have bad caps, transistors, transformer as shown in my pictures here:
http://s807.photobucket.com/albums/yy352/budm/Princeton%20VL1918W/
You need to check them out.
If you are going to DIY and already try the monitor with another PC, and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed PRINCETON monitors to get some ideas what to look for: http://s807.photobucket.com/albums/yy352/budm/
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

Dec 07, 2010 | Princeton Digital VL1918 Monitor

1 Answer

Color flashes magenta


You have check all the pin on the video cable? Try it on another PC? Did you change all the CAPS as a set on the DC side for the 5 and 12vdc section, bad cap can look OK but will have high ESR.

http://s807.photobucket.com/albums/yy352/budm/Princeton%20VL1918W/

Jul 30, 2010 | Princeton Digital VL1918 Monitor

1 Answer

My monitor is going on and off, even if its not connected to the computer. its stays on for 10 seconds saying no signal. then shuts off n comes on again right away for another 10 sec, ect.


matteson1914, If unplugging from wall outlet and then plugging it back in 1 minute later will not stop (correct) the problem you have, then I would suspect (as always) the "switch-mode-power-supply" has a serious problem. Whenever an lcd with CCFL backlighting starts doing very strange and weird stuff, I would suspect the power supply as the culprit and look at it first! If your display is a VL1918 then you WILL need to read all the other posts by clicking on "VL1918 (black) monitor" that is highlghted in blue. If you do any capacitor replacement make sure they go in (installed) correctly(++ - - ) and that new ones are rated for 105 deg cenitgrade (not 85c) If installed wrong they will fail immediatly and you will need to do-over!!!! 12fixlouie

Nov 12, 2009 | Princeton Digital VL1918 Monitor

1 Answer

My Princeton monitor VL1918 keeps blinking on and off. What is wrong


eben161, you might try replacing some "electrolytic filter capacitors" on the "switch-mode-power-supply" printed circuit board. Try to obtain new ones that have temp rating of 105 deg centegrade. remember to replace them + to + and - to - !!! don't screw it up!!! here are some of the values you will need to purchase. 470micro farad (uf) and 2200uf and all should have a voltage rating no lower than 35vdc please report back with the name of the manufacturer you find on the original "failed" ones you remove from the unit. even if they don't look bad (swollen, leaky) replace them all with new one's. If you won't do the work you can also check to see if Princeton can swap you a refurbished unit for your old+cash. But first you should read all the posts that have been written on this model lcd monitor and how they were fixed! I'm 12fixlouie If this response was helpful to you, please rate it on fixya. Bye for now.

Nov 09, 2009 | Princeton Digital VL1918 Monitor

1 Answer

Need free assistant to know if my Princenton VL1918 monitor still is OK - Screen blinks every 5 secods, not able to work.


Hello,

Blinking power lights or flashing screens usually indicates a blown power supply. Heat buildup in the monitor case causes parts called capacitors to overheat and blow out. Check out our web site at: www.ccl-la.com/badcaps.htm We have pictures of what the blown capacitors look like. Open the back of your monitor and look for the blown caps. Replace all the ones that look like the ones in the pictures and you should be back up and running. The values you need to get are going to be marked on the sides of the ones you take out. Be sure to reinstall the new ones with the polarity stripe going the same direction as the old ones come out. You can order replacement parts from several places on the internet or we can supply them for you. You will need to use high temp caps that will be marked 105c, these are not available from Radio Shack. If you use ones that are not rated correctly then you will have more issues in a month or two. If you don't want to do the repair yourself we do offer a repair service for $35 plus return shipping.

I hope this helps, If so please rate our solution.

Buddy
Corporate Computer
www.ccl-la.com
tech@ccl-la.com

Oct 23, 2009 | Princeton Digital VL1918 Monitor

1 Answer

My Princeton LCD monitor VL1919 takes about 15 minutes to lite up. the blue indicator flashes until it turns on.


Hello,

It sounds like you have a monitor with a common problem. After a few years some LCD monitors will blow a power supply. The problem is caused by parts called capacitors overheating in the confined space of the monitor. If you are good at electronics repair/soldering you can usually fix the problem. Check out a few pictures on my web site www.ccl-la.com/badcaps.htm You can take the back cover off your monitor and look for the bad parts,replace any that look like the pictures and your monitor should work fine. The capacitors do need to be installed with the correct + and - connections, note the stripe on the old one and insert the new one the same way. If you have additional questions just email me. If you can't do the repair we offer a repair service, contact us for more details.

I hope this helps, if so please rate my solution.

Buddy
Corporate Computer
www.ccl-la.com
Over 21 years of computer and printer support/repair

Aug 10, 2009 | Princeton Digital VL1918 Monitor

1 Answer

Princeton vl1918 flashes on than off


See previous solution for Princton Monitor cycling on and off.
Solution: Change out 3 capacitors.

Jul 15, 2009 | Princeton Digital VL1918 Monitor

1 Answer

Monitor comes on, then goes back off, rinse, repeat.


Well here is a test you can do. When the monitor goes black, take a flash light and hold at it a angle towards the monitor, if you can still faintly see the image then you have a blacklight/inverter issue. Another common issue with this is the capacitors on the inside. They will also cause this. If you dont see an image then the inverter will need replacing. As the steps for replacing all of this are quite long, ill post a few helpful tuts :).

For replacing the backlight:
http://www.inventgeek.com/Projects/shorts/overview.aspx
For checking/replacing bad capacitors:
http://www.wizardanswers.com/liquidvideorepair.html

I know these arent your monitor but its generally the same idea with all of them. If this doesnt work it will be a inverter issue and if it comes to that just let me know and ill be glad to help :D


Jul 14, 2009 | Princeton Digital VL1918 Monitor

1 Answer

I have a Princeton VL1918 LCD monitor. Need help


Hello,

You have a monitor with a common problem. After a few years some LCD monitors will blow a power supply. The problem is caused by parts called capacitors overheating in the confined space of he monitor. If you are good at electronics repair/soldering you can usually fix he problem. Check out a few pictures on my web site www.ccl-la.com/badcaps.htm You can take the back cover off your monitor and look for the bad parts, replace any that look like the pictues and your monitor should work fine. The capacitors do need to be installed with the correct + and - connections, note the stripe on the old one and insert the new one the same way. If you don't want to try the repair yourself we offer a repair service for $35 plus shipping. If you don't see any bad capacitors then the next thing would be bad CFL (backlight tubes) in the screen itself. If it is that then the monitor needs to be replaced because of the tech skills needed to replace then. I hope this helps, if so please rate my solution.

Buddy
Corporate Computer
www.ccl-la.com
Over 21 years of computer and printer support/repair

Jun 29, 2009 | Princeton Digital VL1918 Monitor

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